SU1239492A1 - Rotary furnace heat exchanger - Google Patents

Description

This invention relates to a heat exchange technique in rotary kilns and can be used in the building materials industry.

The purpose of the invention is to increase the efficiency of the furnace.

FIG. 1 shows an oven; a sub-section of FIG. 2 - the same scan. Inside the furnace 1 with a diameter P on the cold end side is located the curtain 2, the chains in which, for example, are hung beads on the screw blades x 3. Next, with a gap, there is a chain heat exchanger 4 hung on the screw blades x 5. At the bottom of the curtain 2 and chain heat exchanger 4, respectively, corridors 6 and 7, which are free from chains, remain.

In the interval between the chain curtain 2 and the chain heat exchanger 4, the guide vanes 8 are arranged circumferentially, which are angled with, to the generator of the furnace 1.

Between the chain curtain 2 and the blades mi 8, stabilizing blades 9 can be installed, and the blades 8 and 9 can be interconnected by bridges 10 into one unit (shown by dotted lines).

The number and length of the chains of the chain curtain 2, the chain heat exchanger 4, the length of the sections of the furnace 1 on which they are hung, and their other parameters are determined by thermal calculation. The dimensions, the number of blades 8 and the angle of their installation to the forming body of the furnace 1 is determined by the condition of the rotation of the gas doto by an angle of 30-90, which depends on the production capacity of the raw material with the data of the chain curtain 2 and the Chain heat exchanger 4. (the greater the formation, the less the angle of rotation of the flow is required). The dimensions and number of blades 9 are determined from the conditions of spin flow up to a direction parallel to the axis of the furnace 1.

. The dimensions and configuration of the jumpers 10 are determined by the location after the installation of the blades 8 and 9. The remaining dimensions of the parts are determined constructively and tested for strength and operability.

The heat exchanger operates as follows.

The material due to inclination and rotation of the furnace 1 moves along the chain curtain 2 and then along the chain heat exchanger 4. The terrain slope is inclined to the horizon at an angle of repose of the material (30-45.

When chains in the upper part exit the slope, they capture some of the material, which is then picked up by hot gases, which are sucked through the furnace 1 and form a cloud above the slope.

Particularly large drinking is in the heat exchanger 4, where the material is already overdried, because the chain curtain 2 is calculated in such a way that the drying of the material in it takes place up to 8-12% with the formation of granules.

With the passage of a gas / gas cloud through the blades 8, the flow is turned by the calculated angle at which the cloud covers most of the chains located along section 1 above corridor 6.

When the mode of the furnace 1 changes from the design gas velocity changes, which will lead to a change in the angle of rotation of the gas flow, therefore, stabilizing blades 9 are installed, which guarantee the rotation of the flow through the design angle for a wide range of gas flow rates

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Compiled by L, Petrova Editor N, Dumb Tehred O. Gor tv a and Proofreader V. Vut ha

For: kaz 3383/38 Circulation 561 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, D Aushska nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

Claims (2)

1. ROTARY HEAT EXCHANGER? CENTRAL FURNACES, comprising guide blades fixed on its inner surface and a chain of curtains placed in front of it along the gas, placed at an angle to the generatrix of the housing in one section along the circumference, that, in order to increase the efficiency and operation of the furnace, it is equipped with stabilizing blades installed along the axis of the furnace between the guide vanes and the chain curtain. 2. Heat exchanger according to π. 1, characterized in that the guide and stabilizing blades are connected with jumpers. Hshadmy Hot end late fines SU ... 1239492 Figure 1